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Physics 30 - Alberta Education
Physics 30 - Alberta Education

Zonal Flows and Fields Generated by Turbulence in CHS
Zonal Flows and Fields Generated by Turbulence in CHS

... produce a structure. For example, it is well known that the Rossby wave turbulence should generate the Jovian belt or zonal flows [1], and that turbulence should be the cause for the geomagnetic (dipole) field. In 1970s, it was pointed out that the drift wave turbulence should obey the same equation ...
Wiggler_dynamics_PRST-AB
Wiggler_dynamics_PRST-AB

Molecular Nanomagnets: towards molecular spintronics Wolfgang
Molecular Nanomagnets: towards molecular spintronics Wolfgang

... A revolution in electronics is in view, with the contemporary evolution of two novel disciplines, spintronics and molecular electronics. A link between these two fields can be established using molecular magnetic materials and, in particular, single-molecule magnets, which combine the classic macros ...
User Manual v2.1 Copyright © 2011 - 2014 Nicholas F. Chilton
User Manual v2.1 Copyright © 2011 - 2014 Nicholas F. Chilton

... The CF potential is constructed from spherical harmonics to represent the environment in which the spin carrier resides. While twenty-seven terms exist in the full expansion, the number required may be reduced as the CF Hamiltonian must be invariant under the operations of the point group of the mol ...
Chapter-3(phy-2)
Chapter-3(phy-2)

... (Electric Potential) In Fig-1 B is at a higher potential than A because external agent would have to do positive work to push a positive charge from A to B against the direction of the field. Let us now investigate the relation between V and E in the case in which the field is not uniform and in whi ...
Electron Cloud Dynamics in the CesrTA Wiggler
Electron Cloud Dynamics in the CesrTA Wiggler

... reduced the stripes will move closer to the y axis until they merge. At z locations very near the maximum vertical field of the wiggler, where the magnetic field geometry is close to that of a dipole, our simulations show the electron cloud buildup for the wiggler to be identical in buildup time an ...
Finite Element Analysis of Stationary Magnetic Field
Finite Element Analysis of Stationary Magnetic Field

... methods have limited uses and experimental methods are time intensive and expensive (Morozionkov et al., 2008). The problems of magnetic fields calculation are aimed at determining the value of one or more unknown functions for the field considered, such as magnetic field intensity, magnetic flux de ...
arXiv:hep-th/9703136v1 19 Mar 1997
arXiv:hep-th/9703136v1 19 Mar 1997

... and gauge bosons that mediate the unified forces. Indeed, it is not at all clear that the massive modes will form stable asymptotic states that can be (in principal) observed. More than just a generalization of field theory, the crucial fact seems to be that string theory leads by itself naturally t ...
Engineering Physics-II Prof. V. Ravishankar Department of Basic
Engineering Physics-II Prof. V. Ravishankar Department of Basic

... much greater than l then I am not able to resolve the size of the system. I would not know that actually the charge is distributed over a line of length l. I would imagine that all of it is probably concentrated at the center. Therefore, the leading order contribution for the field will be simply gi ...
Phys. Rev
Phys. Rev

... What is a quantum phase transition ? Non-analyticity in ground state properties as a function of some control parameter g ...
Chapter 24
Chapter 24

... We start with the simplest form – two parallel conducting plates separated by vacuum Let the conducting plates have area A and be separated by a distance d The magnitude of the electric field between the two plates is given by We treat the field as being uniform allowing us to write ...
Design of plasmonic nano-antenna for total internal reflection
Design of plasmonic nano-antenna for total internal reflection

Electric Charge - Purdue Physics
Electric Charge - Purdue Physics

CHAPTER 22 The Electric Field I: Discrete Charge Distributions
CHAPTER 22 The Electric Field I: Discrete Charge Distributions

ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC FIELDS

... referred to in Regulation 8 show this to be necessary. (10) Without prejudice to his or her obligations under this Regulation, an employer may, where relevant, take into account the emission levels and other appropriate safety-related data provided by the manufacturer or distributor for the equipmen ...
Research and developments on p-type Germanium lasers in
Research and developments on p-type Germanium lasers in

... The strength of the electric field is determined by the necessity that the hole distribution in the velocity space must be bar-like and with strong anisotropy. When the electric field is weak, the holes are scattered by the acoustic phonons and ionized impurities before reaching the energy of the o ...
Zahn, M. and H.A. Haus, Contributions of Prof. James R. Melcher to Engineering Education, Journal of Electrostatics 34, pp. 109-162, March 1995
Zahn, M. and H.A. Haus, Contributions of Prof. James R. Melcher to Engineering Education, Journal of Electrostatics 34, pp. 109-162, March 1995

... James R. Melcher (JRM) was born in Giard, Iowa on 5 July 1936. He received a BSEE in 1957 and a MS in Nuclear Engineering in 1958, both from Iowa State University. He was a research assistant at the Ames Laboratory of the US Atomic Energy Commission. His first journal paper, based on his master's th ...
F - Purdue Physics
F - Purdue Physics

Honors Physics Review Notes 2008–2009
Honors Physics Review Notes 2008–2009

Phase-field simulation of electric-field-induced in
Phase-field simulation of electric-field-induced in

... layer, while a transverse electric field can induce a 90 inplane switching. Zhong et al. also investigated the electric field controlled magnetization in such multiferroic layered heterostructures using a similar phenomenological approach.23 However, a single domain magnetic film was employed in bo ...
Module 4 UNDERSTANDING ELECTRICITY AND
Module 4 UNDERSTANDING ELECTRICITY AND

Two-Dimensional Free Space Mesh Generation for Cloud-to
Two-Dimensional Free Space Mesh Generation for Cloud-to

... The design of aircraft structure and its protection systems are an important area focused by the manufacturers for flight safety from lightning strike. The metal structures of the aircraft exterior skin normally minimize the lightning effects and prevent physical damage. Modern aircrafts made by the ...
Technological Aspects: High Voltage
Technological Aspects: High Voltage

electromagnetic waves
electromagnetic waves

... A) If both assertion and reason are true and reason is the correct explanation of assertion. (B) If both assertion and reason are true but reason is not the correct explanation of assertion. (C) If assertion is true but reason is false. (D) If assertion is false but reason is true. (a) A ...
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Field (physics)



In physics, a field is a physical quantity that has a value for each point in space and time. For example, on a weather map, the surface wind velocity is described by assigning a vector to each point on a map. Each vector represents the speed and direction of the movement of air at that point. As another example, an electric field can be thought of as a ""condition in space"" emanating from an electric charge and extending throughout the whole of space. When a test electric charge is placed in this electric field, the particle accelerates due to a force. Physicists have found the notion of a field to be of such practical utility for the analysis of forces that they have come to think of a force as due to a field.In the modern framework of the quantum theory of fields, even without referring to a test particle, a field occupies space, contains energy, and its presence eliminates a true vacuum. This lead physicists to consider electromagnetic fields to be a physical entity, making the field concept a supporting paradigm of the edifice of modern physics. ""The fact that the electromagnetic field can possess momentum and energy makes it very real... a particle makes a field, and a field acts on another particle, and the field has such familiar properties as energy content and momentum, just as particles can have"". In practice, the strength of most fields has been found to diminish with distance to the point of being undetectable. For instance the strength of many relevant classical fields, such as the gravitational field in Newton's theory of gravity or the electrostatic field in classical electromagnetism, is inversely proportional to the square of the distance from the source (i.e. they follow the Gauss's law). One consequence is that the Earth's gravitational field quickly becomes undetectable on cosmic scales.A field can be classified as a scalar field, a vector field, a spinor field or a tensor field according to whether the represented physical quantity is a scalar, a vector, a spinor or a tensor, respectively. A field has a unique tensorial character in every point where it is defined: i.e. a field cannot be a scalar field somewhere and a vector field somewhere else. For example, the Newtonian gravitational field is a vector field: specifying its value at a point in spacetime requires three numbers, the components of the gravitational field vector at that point. Moreover, within each category (scalar, vector, tensor), a field can be either a classical field or a quantum field, depending on whether it is characterized by numbers or quantum operators respectively. In fact in this theory an equivalent representation of field is a field particle, namely a boson.
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